为了提高煤、 油气共存的黄陵二矿煤层抽采效率,加快工作面回采及掘进速度,充分分析研究区地质条件,在获取煤、 油气赋存规律的基础上,以205回采工作面运输巷11号钻场为研究对象,利用可远程操作及视频监控的水力压裂设备,对黄陵二矿205工作面运输巷11号钻场底板进行水力压裂试验研究.结果表明:通过底板2个水力压裂钻孔的施工,促使煤层底板油型气富集区域与煤层形成裂隙贯通,压裂影响半径达20 m以上,最高注水压力分别达到了26.8MPa和25.2MPa,远超过了设计的23MPa的理论破压力.通过2个月的抽采监测,与未压裂施工钻孔对比瓦斯抽采浓度平均提高了19倍;瓦斯抽采纯量平均提高了22倍.研究结果为进行煤、 油气共存区域的瓦斯增透抽采技术提供了技术支持.%In order to improve gas drainage efficiency in Huangling No. 2 Mine, in which coal, petroleum and coal bed methane coexists, and enhance the mining and driving speed, we carried out hydraulic fracturing test in 11# drilling site of 205 mining face transportation roadway of Huangling No. 2 Coal Mine using hydraulic fracturing facility with remote control and video monitoring, on the basis of thorough geological analysis and occurrence regularity of coal, petroleum and gas. The results showed that, the oil-type gas enrichment area in coal floor was connected with the coal seam through fissures, after the construction of the 2 hydraulic fracturing boreholes, the fracturing influence radius was over 20m. The highest water injection pressure reached 26. 8MPa and 25. 2MPa respectively which were over the theoretical fracture pressure 23MPa. According to monitoring data in 2 months, the average gas drainage concentration increased 19 times and the average methane amount increased 22 times, compared with the non-fractured data.
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